#1 By: JRose120, January 21st, 2014 03:48
Hello to my fellow crypto enthusiasts
Maybe you've seen my posts on other forums? I've written up several how to guides regarding how to setup large 6 GPU mining rigs. How to setup Solo mining to get the most out of your mining rig. I have a 37Mh/s GPU Mining Farm that consists of 60 Radeon 7950s, all running in the 630Kh/s to 650Kh/s range. My setup defies some of the common misconceptions regarding the limits you keep hearing about. Some examples are powered riser cables, modding the motherboard, dummy plug, cut cables, etc... I don't use any of that. I don't even use any AMD drivers or SDKs. Due to the amount of mining rigs I had to build in a short period of time. I've streamlined the process quite a bit, and taken out a lot of unnecessary steps. All of my mining rigs are stable, and run at blistering speeds.
I've done a segment on Solo mining in which I point out what might be an unfair advantage when following my configuration settings. I am able to take advantage of CGMiner's ability to use multiple stratum servers and then force the work to my own local client. This results in any blocks being solved going directly to my qt-client. This way I don't have to deal with all the problems many pools seam to go through during their growing pains. DDOS attacks, unscrupulous pool operators, etc... I'm not saying pool mining is bad. Only that there are a lot of common misconceptions about Solo Mining. You don't need a huge setup like mine to be a success. Of course your choices are limited a bit more, but it's workable if you watch when the difficulty re targets occur.
I'm still kind of new to this cryptocurrency stuff. However once I fully grasped its enormous potential, I dove in head first and have had what most would consider to a very high rate of success. I never ran into any obstacle I couldn't overcome. I have 20 years hands on experience working with computers. First started building custom computer systems in 1996. I can still remember loading up Windows 98 using 24 floppy disks because the CD-Rom wasn't widely in use at the time. I'm 37 years old and have my MCSE, A+ (both software and hardware), CCNA certifications. I've worked in all levels of tech support all the way up to IT Director for large insurance company. I've built enormous clustered servers with multiple back end database servers. I'm trained to work with BigIp F5 Network Load Balancers, the same kind of equipment eBay uses for their web services. I'm not trying to get hired for a job. Just wanted to give you a little background about myself so you know I'm not some theorist who thinks they know the answer, but who does this kind of stuff as a professional.
When I decided to build my first few mining rigs, I had already ordered $10k worth of equipment without having any knowledge on the subject. I had never mined a single coin. In my case it probably worked in my favor that I don't often post in these forums. There are a lot of things I've been asked about that I was unaware of. I'd never heard of a cut riser cable, a shorted slot on the motherboard, dummy plugs, etc... My heart goes out to those of you who have been frustrated to no end trying to get a full mining rig setup and running as you keep hearing other people talk about. I'll be working over the next few days to help answer some of your questions and to help discard common misnomers on the topic of LiteCoin Mining. While I am a computer guru to some extent. I can't give detailed setting information for GPUs other than the Radeon 7950. I've never worked with any other model and I know there are substantial differences between some of the current GPUs that are popular with scrypt miners. I look forward to helping this community be more successful in the mining efforts. I would appreciate it if you would ask your questions directly on this thread, instead of using a PM. I get a lot of repeat questions and if everyone can see the answer you'd receive it would help out everyone greatly.
#2 By: Leonard Hofstadter, January 21st, 2014 04:25
Hi Jarod, welcome to this community
You are THE MINER man. 37MH/s!
I've couple of questions!
- In what part of the world are you?
- What typo of GPU's are you using?
I'm cc @GoSuB and @Wpgxbx and @t0n who are going to love your experience and add some questions too
#3 By: Go Sub and Return later...., January 21st, 2014 05:36
CLAP CLAP CLAP !!!!!
welcome onboard and thank you for your post. @JRose120
#4 By: Leonard Hofstadter, January 21st, 2014 08:21
Can you explain a little bit what software do you use to mine alone?
#5 By: Wpgxbx, January 21st, 2014 10:15
Welcome and thanks for sharing! I'm sure you'll find a great community here.
My question... I see you are mining at Multipool. Have you gotten to the conclusion that it's the best option for altcoin switching pools? If so, what do you do with all the different coins Multipool mines for you? cryptsy?
#6 By: thetran209, January 21st, 2014 12:10
Who is your electricity provider and how much do pay a month for electricity with your setup?
#7 By: Go Sub and Return later...., January 21st, 2014 12:28
my questions, and thank you in advanced @JRose120 :
- Solo or Pool ? (I have 7 servers with 2 x video cards)
- wemineltc or middlecoin or multipool ?
- 2 cards or 5 cards in each motherboard ? (lots or two)
- cgremote? other similar app ? as I see is a private beta
- Im using hd7950 dual-x but at 530 kh/s or 630 kh/s only.
I will try this config this night, suggestions ?
"intensity" : "20,20",
"vectors" : "1,1",
"worksize" : "256,256",
"kernel" : "scrypt,scrypt",
"lookup-gap" : "2,2",
"thread-concurrency" : "21712,21712",
"shaders" : "0,0",
"api-port" : "4028",
"api-mcast-port" : "4028",
"expiry" : "120",
"gpu-engine" : "0-0,0-0",
"gpu-fan" : "0-85,0-85",
"gpu-dyninterval" : "7",
"gpu-memdiff" : "0,0",
"gpu-memclock" : "0,0",
"gpu-powertune" : "20,20",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-vddc" : "0.000,0.000",
"gpu-reorder" : "true",
"log" : "5",
"no-pool-disable" : true,
"scan-time" : "30",
"shares" : "0",
"scrypt" : true,
"kernel-path" : "/usr/local/bin",
"temp-target" : "75,75",
"temp-overheat" : "85,85",
"temp-cutoff" : "90,90",
"auto-fan" : "true",
"queue" : "1",
"no-submit-stale" : true,
"temp-hysteresis" : "3"
#8 By: t0n, January 21st, 2014 15:48
Hi there dude! I saw and commented on your post over at Litecointalk! Great job on getting everything set up and a big welcome to this humble community Hope you are doing well!
EDIT: Also, I mine at middlecoin atm and I have to say that my gains on my humble 1.2 MH/s are nice. Receiving around 0.45 LTC everyday after exchanging from BTC on BTC-e and today has been a huge profit day, I think that has been caused by doge.
#9 By: Leonard Hofstadter, January 21st, 2014 15:59
Hi T0n, @GoSuB mentioned me today that Middelcoin found 300 BTC's today. Perhaps, that's the reason of our big payday today?
#10 By: Go Sub and Return later...., January 21st, 2014 16:28
Today in middlecoin more than 350 BTC and it isn´t finished the day....
#11 By: t0n, January 21st, 2014 16:35
I don't think that the statement "finding 300 BTC" is correct as BTC are only gained through exchange from altcoins. I think it has a lot to do with Doge coin spiking a lot today making it very profitable. Check coinwarz the value has doubled.
#12 By: Leonard Hofstadter, January 21st, 2014 16:37
OK. So, they mined altcoins and created the same value that 300 BTCs represents. Is that correct?
#13 By: t0n, January 21st, 2014 16:39
Yeah they only mine the most profitable scrypt coins based on some algorithm and exchange them automagically on exchanges for BTC.
#14 By: Go Sub and Return later...., January 21st, 2014 16:39
Yes, you are right....
+300 BTC is the changed coins.
#15 By: Go Sub and Return later...., January 21st, 2014 16:42
Im not sure about the double price"
#16 By: JRose120, January 21st, 2014 17:53
I'm located in sunny South Florida, about one block from the Atlantic Ocean. It's warm down here almost all year round. We do get a few days each year that dip into the 50's but those days are far and few between.
I have everything setup and running in the garage. The amount of power the 60 GPUs use is about 150 amps continuously, 24/7. I had to have an electrician upgrade the house's capacity from 100 amps to 225 amps just so I could pull this off. Power and heat and have been my limiting factors in my ability to grow any larger . The amount of heat these machines put off is enormous.I keep half dozen box fans blowing on the equipment. Then I use two large centrifugal fans to push a tremendous amount of airflow through the garage area. Centrifugal fans are like mini jet engines. They slowly spin up and when they are going full blast they can knock you around That's the kind of airflow you need to keep the temperature in the 70C range when the ambient temperature is in the mid to upper 80s.
Obviously the hardware has dried up and we are all scrambling to find alternative ways to mine profitably. I must of had some very lucky timing, I started this project at the end of November. At that time you could buy Sapphire Radeon 7950's from NewEgg for $189.95. I only ordered a dozen of them. The rest cost substantially more.
LiteCoin was still trading at $5 when I put my first mining rigs online. Within a week of going online LiteCoin had skyrocketed in value. Which worked out both good and bad for me. I purchased $1000 worth of BitCoin in in early December so that I could buy LiteCoin at BTC-e. Since I was a new customer at Coinbase I had to wait 5 days before getting my Bitcoins. By the time they did release them they had doubled in value! I took my $2000 worth of BTC and purchased about 400 LiteCoin. LTC was still trading at $5 at that time. I always knew it had a lot of potential. I rode that wave all the way up $44. Then sold my entire position. I cashed out while BitCoin was still above a $1000 and nailed it every step of the way. It was uncanny how I could feel what the market was going to do. I hope that a lot of you had similar experiences. Early adopters are heavily rewarded in this business. Don't forget that. Long story short, that large gain was turned into more mining rigs. That's how I got to be this size. I'm not rich, I just graduated from college with a mountain of debt. I went to the University of Central Florida to study Anthropology. I specialized in Meso American Archaeology. Computers were always something I was good at, and I've worked in the IT field most of my life.
The mining farm consists of PowerColor, Sapphire, XFX, Radeon 7950 GPUs. They all use the same chipset, code named "Tahiti". That's why you can use basically any 7950 clone and get excellent results. I think these cards all use the same microprocessors. It's just the manufacturer's name and the look of the GPU that's different. Their guts are all basically the same.
To solo mine you still use all the same software you would normally be using. It's actually not very difficult to setup your own private mining pool. Lucky for us, CGminer has a built in feature that makes this all possible. I discovered the command while I was reading the "read me" file that came with CGminer. I was intrigued by the failover only command. One of the cools features they built into it, is to force it use alternative or backup stratum servers to force new blocks to your client much, much, faster than the client is capable of on it's own. To be honest it really wouldn't work well it at all if you relied on the qt client to tell your miners about a new block the second it comes out. There is a huge delay, probably as much 10 seconds between when you local client sees a new block versus a stratum server. I ran a few tests and saw that my mining rigs that were solo mining were getting the blocks way after the miners I had that were in a pool. I could see the delay, and it was bad. Having already seen how poorly the qt client performed when I discovered you could force work from a backup stratum server (aka a mining pool) to your local client, it took care of that huge performance gap. Also studying the way the solved blocks are broadcast out on the network i discovered if I setup another laptop with the same coin's qt client running, it gave me a secondary node that was also going to broadcast my block out on to the network. So now when I'm solo mining, I'm using a stratum server for ultra fast block chain downloads, forcing the solved blocks to be sent to my qt client, and then have multiple nodes broadcast that I found a block. I still get an occasional stale or rejected block, but it's always below 1%.
Basically what I've seen happen with my configuration, is the following. If you take a pool with 20 miners in running at 35Mh/s and then I go online solo mining with the same amount of hashing power, this is also assuming that the pool and myself are the only two contributing to the network's hashrate. I want to keep things simple so you understand. With the two of us both running equally, I solve way more than 50% of the blocks. It's closer to 70-80%. I have to admit I feel bad when I see a pool running faster than me and it only hits a block every 10 minutes, while i'm hitting them every 2-3 minutes. It's definitely real, I'm not trying to cheat anyone. Now, if both of us were just a small part of the entire network hash rate, I would still solve a higher percentage. But it won't be as high as 80%, I'm now competing with many more computers that might be setup like mine. But still, I never see a pool perform as well I can. The only time I mine in a pool is for something like DOGEcoin. It's difficulty level is already too high for me to be interested in it, and the only way to mine it at this point is in a pool. Kind of like LiteCoin, it would take me 5 days on average to hit a LiteCoin block solo mining. I have hit one, just because I really wanted to. It took me a total of 4 days of mining. It wasn't all done at once. I would let it run for 12-24 hours at a time, a couple of times a month. Only when I could afford to risk making nothing. If I go a week without getting paid, that's not good. I have a lot of bills to pay.
I use MultiPool because they are one of the only pools out there that don't owe me money. I'm not kidding. So many places have crashed in the middle of the night and never gone back to figure out who earned what,so the pool operator just kept it all. I have banned list,of places I won't go. No body has gotten away with more than $80 from me, but still, this sucks. MultiPool hasn't stolen anything from me that I'm aware of. There systems run well most of the time. Better than most other pools. I can usually get 98% efficiency from MultiPool, while everyone else is lucky to give me 96%. A lot of factors come into play, such as how far away you are from the mining pool. Ideally you want to find a pool located as close as possible to your location. The latency can cut your hashrates by as much as 10-20%, if you can ping the pool's front end web server at under 50ms, then you're at a good pool. If it's above 100ms, try finding a closer pool. I mainly mine DogeCoin, I've tried their Multi port feature and to be honest it kind of drives me nuts. It can switch coins several times a minute, it usually doesn't, but sometimes it can't make up its mind. This results in all kinds of down time while I'm waiting for a new block chain from a different coin. I don't like downtime, so I choose to mine their coins directly using a specific port.
WeMineLTC has some of the most impressive servers I've seen out there. They don't charge a fee and they provide an excellent service. However, with current market conditions, Litecoin is not valuable enough to mine. I do chase the money, and right now it's in DogeCoin. I can't believe this silly coin has grown to become such a hit! It just goes to show, you never really know what going to be hot next.
#17 By: JRose120, January 21st, 2014 18:04
Your looking at Digital Coin, look for DOGE, it's actually quadrupled in value over the past several days.
#18 By: Gernald, January 21st, 2014 22:56
I've got tot say I'm very impressed with but the stability of your rigs and honestly the space in which you are powering 60 space heater.... I mean GPU's.
I've got a slightly larger mining farm setup, but it's not nearly as well thought out as yours. Would you be willing to come by and give us a few pointers? I'd be happy to compensate you for your time of course! The farm is located in Plantation Florida, sounds like we are almost neighbors.
#19 By: t0n, January 22nd, 2014 01:56
Btw jarod did you try any of the modified bioses from thestilt on litecointalk? Might add to your farm
#20 By: JRose120, January 22nd, 2014 14:01
That's great neighbor, yea I'd love to see your operation. I built those shelves my mining rigs are on. It took some trial and error to discover just how many I could pack into a small space while still providing enough airflow. Actually having them all close together has worked out well. I don't need as many fans. I bought a miter saw to build all the cases and shelves. That was probably the most annoying part of the build. I'm not a carpenter and have no experience building things out of wood. It wasn't that difficult. Just measure twice and cut once. PM me if you want to set something up. The next few days I'll be tied to the house. I started leasing out my GPU farm on eBay and I wasn't prepared for the overwhelming response. I booked up for a week within 8 hours of posting the ad. I had to pull down the remaining slots just so I can deal with what's already on my plate. My new business model is a whole other story I could go into. Basically I'm selling 4, 12, and 24 hour blocks of time. I look at my daily averages and pick a number that I would be happy with and price it from there. I'm not really marking things up that much. For example, my current customers I may have paid to use my equipment. The price on Doge shot up, but now the difficulty has caught up so fewer coins are being generated to equal things out. Either way, I'm happy. I have a slightly steadier income, and I can get paid for next weeks work this week. This is all still trial and error. I'm sure after I get burned once by a con artist I'll stop leasing it out. Let's hope that doesn't happen.
No I haven't tried a custom BIOS. I've heard rumors that the Gigabyte 7950s can be made to run as fast as 700Kh/s. But I have never seen any real proof of that. With most cards running between 630Kh/s and 650Kh/s I'm happy with that. I know if they run any faster they will have to use more power. I'm already pushing my PSUs at near maximum capacity 24/7. If you can point me in the direction of some specific information I'll be happy to take a look at it.
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